
\begin{table}[ht]
\begin{center}
\begin{tabular}{l c c c c}
\hline
 & \multicolumn{2}{c}{Pilot} & \multicolumn{2}{c}{Main Study} \\
\cline{2-3} \cline{4-5}
 & Model 1 & Model 2 & Model 3 & Model 4 \\
\hline
Intercept                                & $0.22^{***}$ & $0.22^{***}$ & $0.21^{***}$ & $0.23^{***}$ \\
                                         & $(0.02)$     & $(0.03)$     & $(0.02)$     & $(0.02)$     \\
Incentive                                & $0.06^{**}$  & $0.04$       & $0.05^{**}$  & $0.04$       \\
                                         & $(0.02)$     & $(0.04)$     & $(0.02)$     & $(0.03)$     \\
Information                              & $0.08^{***}$ & $0.09^{*}$   & $0.06^{**}$  & $0.05$       \\
                                         & $(0.02)$     & $(0.04)$     & $(0.02)$     & $(0.03)$     \\
Cognitive Load                           & $-0.00$      & $0.03$       & $0.01$       & $-0.04$      \\
                                         & $(0.02)$     & $(0.05)$     & $(0.02)$     & $(0.04)$     \\
Incentive x Information                  &              & $0.02$       &              & $-0.03$      \\
                                         &              & $(0.06)$     &              & $(0.05)$     \\
Incentive x Cognitive Load               &              & $0.00$       &              & $0.05$       \\
                                         &              & $(0.07)$     &              & $(0.05)$     \\
Information x Cognitive Load             &              & $-0.10$      &              & $0.05$       \\
                                         &              & $(0.07)$     &              & $(0.05)$     \\
Incentive x Information x Cognitive Load &              & $0.09$       &              & $0.00$       \\
                                         &              & $(0.10)$     &              & $(0.07)$     \\
\hline
R$^2$                                    & $0.01$       & $0.02$       & $0.01$       & $0.01$       \\
Adj. R$^2$                               & $0.01$       & $0.01$       & $0.01$       & $0.01$       \\
Num. obs.                                & $1504$       & $1504$       & $2503$       & $2503$       \\
\hline
\multicolumn{5}{l}{\scriptsize{$^{***}p<0.001$; $^{**}p<0.01$; $^{*}p<0.05$}}
\end{tabular}
\caption{Regression Results Experimental Study}
\label{table:coefficients}
\end{center}
\end{table}
